yaga80

 Profile Answers by yaga80 

• Jan 25th, 2009

 

private int toInt(char c)

{

switch (c) {

    case 'I': return 1;

    case 'V': return 5;

    case 'X': return 10;

    case 'L': return 50;

    case 'C': return 100;

    case 'D': return 500;

    case 'M': return 1000;

    default: return 0;

    }
}

public int calc(char[] input)

{

    int total = 0;

    int previous = 0;

    // no previous digit handled

    for (int i = input.length - 1; i >= 0; i--)

    {

        int current = toInt(input[i]);

        int sign = (current < previous) ? -1 : 1;

        previous = current;

        total += sign * current;

    }

    return total;

}